Reality Check
Penultimate Amazing
Still insisting on dipslaying your ignorance, pedrone.
You really cannot get the simple concept that science progresses and the experimental results are refined.
Measured in 1940: On the Value of the Electric Quadrupole Moment of the Deuteron
As stated by the latter authors, the quadrupole moment is 2.73 × 10-27 cm2. The writer estimates the limits of error of this value to be +/-2 percent.
Measured in 1950: The Electric Quadrupole Moment of the Deuteron
The value obtained is QD=(2.766±0.025)×10-27 cm2
Measured in 1972: Quadrupole Moment of the Deuteron
With the use of experimental values of the quadrupole interaction constant, the electric quadrupole moment of the deuteron is found to be 0.2875 F2 which is 2% larger than the most recent values. The estimated error is 0.002 F2
Published in 1998: Stones Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments (PDF)
+0.00286(2) barns (PR A20 381 (79))
and 0.0028(2) barns (NP A435 502 (85))
Measured in 2010: Determination of deuteron quadrupole moment from calculations of the electric field gradient in D2 and HD
We have carried out an accurate determination of the quadrupole moment of the deuteron nucleus. The evaluation of the constant is achieved by combining high accuracy Born-Oppenheimer calculations of the electric field gradient at the nucleus in the H2 molecule with spectroscopic measurements of the quadrupolar splitting in D2 and HD. The derived value is Q=0.285783(30) fm2.[/QUOTE]
(emphasis added)
Wikipedia value (no citation though):
Deutrium
The measured electric quadrupole of the deuterium is 0.2859 e·fm2.
P.S.
Can you cite the papers that Guglinski has written on quantum ring theory?

